body {
     background: darkgrey;
    
}


.contenedor{
    width: 80%;
    margin: auto;
    background-image: url("../img/bg.jpg"); 
  
    font-size: 14px;
    line-height: 22px;
    font-style: italic;
    text-align: center;
    margin-left: auto;
    margin-right: auto;
    color: #777;
    padding-left: 15px;
    font-family: Cambria, Georgia, serif;
    border-left: 8px solid rgba(63,148,148, 0.1);
    position: relative;

    padding: 20px 15px 50px 50px;
    border-radius: 10px;
    box-shadow: 0 10px 10px 0px rgba(0, 0, 0, 0.8);
}

.contenedor .titulo{
    font-size: 3.5ex;
    font-weight: bold;
    margin-left: 10px;
    margin-bottom: 10px;
}

#pestanas {
    float: top;
    font-size: 3ex;
    font-weight: bold;
}

#pestanas ul{
    margin-left: 70px;
}

#pestanas li{
    background: #5ba4a4;
    background: -moz-linear-gradient(top, #5ba4a4 0%, #4e8c8a 100%);
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#5ba4a4), color-stop(100%,#4e8c8a));
    background: -webkit-linear-gradient(top, #5ba4a4 0%,#4e8c8a 100%);
    background: -o-linear-gradient(top, #5ba4a4 0%,#4e8c8a 100%);
    background: -ms-linear-gradient(top, #5ba4a4 0%,#4e8c8a 100%);
    background: linear-gradient(top, #5ba4a4 0%,#4e8c8a 100%);

    font-size: 15px;
    line-height: 40px;
    height: 40px;
    position: relative;
    padding: 0 20px;
    float: left;
    display: block;
    color: #385c5b;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-weight: bold;
    text-align: center;
    text-shadow: 1px 1px 1px rgba(255,255,255,0.3);
    border-radius: 3px 3px 0 0;
    box-shadow: 2px 0 2px rgba(0,0,0,0.1), -2px 0 2px rgba(0,0,0,0.1);

    
    
}

#pestanas a:link{
    text-decoration: none;
    color: white;
}

#contenidopestanas{
    clear: both;  
    background: white;
    padding: 20px 0px 20px 20px;
    border-radius: 5px;
    border-top-left-radius: 0px;
    $hola = (margin-left: auto);
    margin-left: auto;
    margin-right: auto;
    width: 80%;
}